A lot is personal preference, I find them just as quick to use as the 116. The biggest draw is the price I can buy the traps direct from the states and even with the dollar exchange rate at the moment they still work out with shipping at least £3.00 cheaper per trap than a 116.
Both traps do not generally take prisoners but at the end of the day it all depends how the animal enters the trap and at what speed, I have been using a mix of Kania's, 120-2's and 116's at this contract and out of the 69 killed so far only two were foul caught in bodygrip traps. The kania's have had no miss catches